greatplains
May run into trouble with the legality for using them for hunting in CO, regulations restrict bullets to benolonger than twice the diameterduring the muzzleloading season. PS, the rifle in question is a .54 cal.
They will be legal in CO... we did check that. They are short of being one inch long.
.54 cal is a different story... the bullets are still legal by length but the selction is some what limited...
No Excuses does build a .540/535 grain bullet that will also work in CO. BUT! they are to small for 54 cal Lyman Trade rifle - they drop right to the bottom... I, of course do not know about your barrel, it may work just fine. Dave also has no problem with you shipping them back if they do not fit, might have him send you a few to check with.
http://members.aol.com/noexcusesb/index_files/Page319.html
Bull Shop, Dan has just begun building 54 cal conicals and he has a far better selection in weights and sizes for the 54. I would suggest you e-mail him he might even send you a few to try. He is making a .541/2/3 400 grain bullet that looks awful good. And they would also be CO legal. Dan is a great guy he will really work with you.
http://bullshop.gunloads.com/
mike